<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    *{
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    section{
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        background: #042104;
        animation: animateBg 10s linear infinite; 
    }
    /* 颜色变化 */
    @keyframes animateBg{
        0%{
            filter: hue-rotate(0deg);
        }
        100%{
            filter: hue-rotate(260deg);
        }
    }
    section .loader{
        position: relative;
        width: 120px;
        height: 120px;
    }
    section .loader span{
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        transform: rotate(calc(18deg * var(--i)));
    }
    section .loader span::before{
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 15px;
        height: 15px;
        border-radius: 50%;
        background-color: aqua;
        box-shadow: 0 0 10px aquamarine,
        0 0 20px aqua,
        0 0 40px aqua,
        0 0 60px aqua,
        0 0 80px aqua,
        0 0 100px aqua;
        /* animation: animate 1s linear infinite; */
        animation: animatessc 2s linear infinite;
        /* 转动 */
        animation-delay: calc(0.1s * var(--i)); 
    }
    /* 缩放 */
    @keyframes animatessc{
        0%{
            transform: scale(1);
        }
        80%,100%{
            transform: scale(0);
        }
    }
</style>
<body>
    <section>
        <div class="loader">
            <span style="--i:1"> </span>
            <span style="--i:2"> </span>
            <span style="--i:3"> </span>
            <span style="--i:4"> </span>
            <span style="--i:5"> </span>
            <span style="--i:6"> </span>
            <span style="--i:7"> </span>
            <span style="--i:8"> </span>
            <span style="--i:9"> </span>
            <span style="--i:10"> </span>
            <span style="--i:11"> </span>
            <span style="--i:12"> </span>
            <span style="--i:13"> </span>
            <span style="--i:14"> </span>
            <span style="--i:15"> </span>
            <span style="--i:16"> </span>
            <span style="--i:17"> </span>
            <span style="--i:18"> </span>
            <span style="--i:19"> </span>
            <span style="--i:20"> </span>
 
        </div>
    </section>
</body>
</html>